#include<stdio.h>
#include<string.h>
#include<unistd.h>
#include<sys/types.h>

int main()
{
    // fprintf(stdout,"hello stdout\n");
    // fprintf(stderr,"hello stderr\n");

    printf("hello printf\n");
    fprintf(stdout,"hello fprintf\n");

    const char* msg = "hello write\n";
    write(1,msg,strlen(msg));

    fork();
    return 0;
}